Commit a78ce80d authored by Dave Martin's avatar Dave Martin Committed by Linus Torvalds
Browse files

metag/ptrace: Preserve previous registers for short regset write



Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill all the registers, the thread's old registers are preserved.
Signed-off-by: default avatarDave Martin <Dave.Martin@arm.com>
Acked-by: default avatarJames Hogan <james.hogan@imgtec.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 502585c7
...@@ -303,7 +303,7 @@ static int metag_tls_set(struct task_struct *target, ...@@ -303,7 +303,7 @@ static int metag_tls_set(struct task_struct *target,
const void *kbuf, const void __user *ubuf) const void *kbuf, const void __user *ubuf)
{ {
int ret; int ret;
void __user *tls; void __user *tls = target->thread.tls_ptr;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1); ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
if (ret) if (ret)
......
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